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diff --git a/iidx/asphyxia/README.md b/iidx/asphyxia/README.md
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+# duel0213 Asphyxia IIDX to Batch Manual
+
+> Important, this is only compatible with [duel's Asphyxia plugin](https://github.com/duel0213/asphyxia-plugins). If you use something else it probably won't work as save formats differ.
+
+# Get Score file
+1. Go to the Web UI and select IIDX
+2. Select `Profiles`
+3. Select `Data`
+4. Choose `Score Export`
+5. If a page opens instead of a file downloading, hit `CTRL+S` and save it somewhere
+
+Command Line Arguments
+- `-f, --file` (required): Path to your Asphyxia score export JSON file
+- `-so, --sp-output`: Output filename for Single Play scores (default: `iidx_scores_sp.json`)
+- `-do, --dp-output`: Output filename for Double Play scores (default: `iidx_scores_dp.json`)
+- `-s, --service`: Service description shown on Tachi (default: `"beatmania IIDX Asphyxia Export"`)
+
+Output
+
+The script generates two separate JSON files:
+
+- **SP file**: Contains all Single Play scores (NORMAL, HYPER, ANOTHER, LEGGENDARIA)
+- **DP file**: Contains all Double Play scores (DP NORMAL, DP HYPER, DP ANOTHER, DP LEGGENDARIA)
diff --git a/iidx/asphyxia/iidx_duel0213_to_tachi.py b/iidx/asphyxia/iidx_duel0213_to_tachi.py
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+++ b/iidx/asphyxia/iidx_duel0213_to_tachi.py
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+import argparse
+import json
+import os
+from datetime import datetime
+
+
+LAMP_MAP = {
+    1: "FAILED",
+    2: "ASSIST CLEAR",
+    3: "EASY CLEAR",
+    4: "CLEAR",
+    5: "HARD CLEAR",
+    6: "EX HARD CLEAR",
+    7: "FULL COMBO"
+}
+
+DIFFICULTY_MAP = { # Beginner difficulty not supported
+    1: "NORMAL",
+    2: "HYPER",
+    3: "ANOTHER",
+    4: "LEGGENDARIA",
+    6: "DP NORMAL",
+    7: "DP HYPER",
+    8: "DP ANOTHER",
+    9: "DP LEGGENDARIA"
+}
+
+def convert_duel0213_to_tachi(file: str, single_output_path: str, double_output_path: str, service: str):
+    with open(file, "r", encoding="utf-8") as infile:
+        sp_scores = []
+        dp_scores = []
+        export_data = json.load(infile)
+        data_sect = export_data["data"]
+        for score_id in data_sect:
+            data = data_sect[score_id]
+            if data["collection"] != "score":
+                continue
+
+            music_id = str(data["mid"])
+            cArray = data["cArray"]
+            played_levels = []
+            for i in range(10):
+                if i == 0 or i == 5: # skip BEGINNER
+                   continue
+                if cArray[i] != 0:
+                    played_levels.append((i, cArray[i]))
+
+            for diff, lamp_val in played_levels:
+                score = data["esArray"][diff]
+                difficulty = DIFFICULTY_MAP[diff]
+                pgreat = data["pgArray"][diff]
+                great = data["gArray"][diff]
+                lamp = LAMP_MAP[lamp_val]
+                timestamp_str = data["updatedAt"]
+                timestamp = int(datetime.fromisoformat(timestamp_str.replace('Z', '+00:00')).timestamp() * 1000)
+                judgements = {
+                    "pgreat": pgreat,
+                    "great": great,
+                }
+                score_obj = {
+                    "score": score,
+                    "timeAchieved": timestamp,
+                    "matchType": "inGameID",
+                    "identifier": music_id,
+                    "lamp": lamp,
+                    "difficulty": difficulty,
+                    "judgements": judgements
+                }
+                if diff <= 4: # SP
+                    sp_scores.append(score_obj)
+                else:
+                    dp_scores.append(score_obj)
+
+    batch_manual_single = {"meta": {"game": "iidx", "playtype": "SP", "service": service}, "scores": sp_scores}
+    batch_manual_double = {"meta": {"game": "iidx", "playtype": "DP", "service": service}, "scores": dp_scores}
+
+    with open(single_output_path, "w", encoding="utf-8") as spoutfile:
+        json.dump(batch_manual_single, spoutfile, indent=4, ensure_ascii=False)
+        print(f"SP Output saved to {single_output_path}")
+
+    with open(double_output_path, "w", encoding="utf-8") as dpoutfile:
+        json.dump(batch_manual_double, dpoutfile, indent=4, ensure_ascii=False)
+        print(f"DP Output saved to {double_output_path}")
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        prog="iidx_duel0213_to_tachi.py",
+        description="Converts duel0213 Asphyxia IIDX save data to Tachi compatible JSON",
+    )
+    parser.add_argument(
+        "-s",
+        "--service",
+        help="Service description to be shown on Tachi (Note for where this score came from)",
+        default="beatmania IIDX Asphyxia Export",
+    )
+    parser.add_argument("-f", "--file", help="Score Export JSON Get this by going to the WebUI -> Profiles -> Detail -> Data -> Score Export", required=True)
+    parser.add_argument(
+        "-so", "--sp-output", help="Output filename for SP scores", default="iidx_scores_sp.json"
+    )
+    parser.add_argument(
+        "-do", "--dp-output", help="Output filename for DP scores", default="iidx_scores_dp.json"
+    )
+    args = parser.parse_args()
+    if args.file is None:
+        print("ERROR: Please specify score JSON. Get this by going to the WebUI -> Profiles -> Detail -> Data -> Score Export")
+        exit(1)
+    if not os.path.exists(args.file):
+        print(f"ERROR: The file {args.file} does not exist.")
+        exit(1)
+
+    convert_duel0213_to_tachi(args.file, args.sp_output, args.dp_output, args.service)